Narrator: Listen to part of a lecture in a biology class.
Professor: So, we've been discussing animal communication, and today I want to focus on a fascinating example: the waggle dance of honeybees. When a forager bee finds a good source of nectar or pollen, it returns to the hive and performs a series of movements on the vertical surface of the comb. This dance conveys information about the distance and direction of the food source relative to the sun. The angle of the dance relative to vertical indicates the angle of the food source relative to the sun's position. The duration of the waggle run, which is the straight part of the dance, communicates distance. For example, a longer waggle run means the food is farther away. Interestingly, the bee also adjusts its dance based on the quality of the food. If the nectar is especially rich, the bee repeats the dance more vigorously and for a longer period. This encourages more hive mates to follow. So, the dance is not just a simple map; it's a dynamic message that includes both spatial and quality information.
❓ คำถาม What does the professor imply about the waggle dance of honeybees?
A. A. It provides only information about the direction of the food source.
B. B. The duration of the waggle run indicates the quality of the nectar.
C. C. The dance includes both spatial details and a signal of food quality.
D. D. Bees perform the dance only when the food source is very close.
✅ คำตอบที่ถูกต้อง
C. The dance includes both spatial details and a signal of food quality.
TOEFL Listening Tips
Skim the questions first to predict the content
Watch for signal words in lectures and conversations (however, actually, in fact)
For main idea questions, focus on the beginning; for detail questions, focus on examples and data
For attitude questions, pay attention to the speaker's tone and word choice
Take notes on keywords; don't try to write down every word
